The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2021
Filed:
Apr. 16, 2019
Applicant:
Nidec Elesys Corporation, Kawasaki, JP;
Inventor:
Osamu Maeshima, Kawasaki, JP;
Assignee:
NIDEC ELESYS CORPORATION, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/42 (2006.01); H02P 29/024 (2016.01); B62D 5/04 (2006.01); H02M 1/32 (2007.01); H02M 7/48 (2007.01);
U.S. Cl.
CPC ...
H02P 29/0241 (2016.02); B62D 5/04 (2013.01); H02M 1/32 (2013.01); H02M 7/48 (2013.01);
Abstract
A failure diagnosis method for an inverter circuit includes a first monitoring step of monitoring an inter-terminal voltage between a high-potential-side terminal and a low-potential-side terminal of each of a plurality of driving devices included in the inverter circuit, and a second monitoring step of monitoring a power supply voltage of the inverter circuit. A determination step of determining whether there is a failure in each of the driving devices from a value of the inter-terminal voltage and a value of the power supply voltage is included.